[ 10.826647][ T251] ip (251) used greatest stack depth: 23424 bytes left [ 12.938117][ T292] 8021q: 802.1Q VLAN Support v1.8 [ 14.861903][ T316] br0: port 1(veth1) entered blocking state [ 14.862409][ T316] br0: port 1(veth1) entered disabled state [ 14.862816][ T316] veth1: entered allmulticast mode [ 14.865239][ T316] veth1: entered promiscuous mode [ 14.938913][ T318] br0: port 2(veth2) entered blocking state [ 14.939302][ T318] br0: port 2(veth2) entered disabled state [ 14.939650][ T318] veth2: entered allmulticast mode [ 14.941734][ T318] veth2: entered promiscuous mode [ 15.133033][ T40] br0: port 1(veth1) entered blocking state [ 15.133434][ T40] br0: port 1(veth1) entered forwarding state [ 15.215692][ T45] br0: port 2(veth2) entered blocking state [ 15.216022][ T45] br0: port 2(veth2) entered forwarding state [ 45.680666][ T409] br0: port 2(veth2) entered disabled state [ 45.692449][ T409] ip (409) used greatest stack depth: 23352 bytes left [ 45.764705][ T410] br0: port 1(veth1) entered disabled state [ 45.884385][ T411] veth2: left allmulticast mode [ 45.884780][ T411] veth2: left promiscuous mode [ 45.885378][ T411] br0: port 2(veth2) entered disabled state [ 45.888567][ T411] veth1: left allmulticast mode [ 45.888813][ T411] veth1: left promiscuous mode [ 45.889146][ T411] br0: port 1(veth1) entered disabled state [ 46.041378][ T412] [ 46.041546][ T412] ============================================ [ 46.041736][ T412] WARNING: possible recursive locking detected [ 46.041923][ T412] 6.13.0-rc5-virtme #1 Not tainted [ 46.042070][ T412] -------------------------------------------- [ 46.042253][ T412] ip/412 is trying to acquire lock: [ 46.042396][ T412] ffffffffb1fd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 46.042702][ T412] [ 46.042702][ T412] but task is already holding lock: [ 46.042919][ T412] ffffffffb1fd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 46.043222][ T412] [ 46.043222][ T412] other info that might help us debug this: [ 46.043432][ T412] Possible unsafe locking scenario: [ 46.043432][ T412] [ 46.043644][ T412] CPU0 [ 46.043755][ T412] ---- [ 46.043864][ T412] lock((netdev_chain).rwsem); [ 46.044010][ T412] lock((netdev_chain).rwsem); [ 46.044159][ T412] [ 46.044159][ T412] *** DEADLOCK *** [ 46.044159][ T412] [ 46.044376][ T412] May be due to missing lock nesting notation [ 46.044376][ T412] [ 46.044587][ T412] 2 locks held by ip/412: [ 46.044697][ T412] #0: ffffffffb1fe7a48 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_dellink+0x228/0xa40 [ 46.044985][ T412] #1: ffffffffb1fd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 46.045294][ T412] [ 46.045294][ T412] stack backtrace: [ 46.045481][ T412] CPU: 0 UID: 0 PID: 412 Comm: ip Not tainted 6.13.0-rc5-virtme #1 [ 46.045699][ T412] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 46.045884][ T412] Call Trace: [ 46.045998][ T412] [ 46.046076][ T412] dump_stack_lvl+0x82/0xd0 [ 46.046238][ T412] print_deadlock_bug+0x40a/0x650 [ 46.046389][ T412] validate_chain+0x5bf/0xae0 [ 46.046540][ T412] ? __pfx_validate_chain+0x10/0x10 [ 46.046691][ T412] ? hlock_class+0x4e/0x130 [ 46.046837][ T412] ? mark_lock+0x38/0x3e0 [ 46.046953][ T412] __lock_acquire+0xb9a/0x1680 [ 46.047107][ T412] lock_acquire.part.0+0xeb/0x330 [ 46.047254][ T412] ? blocking_notifier_call_chain+0x50/0x90 [ 46.047438][ T412] ? netconsole_process_cleanups_core+0x2e/0x3d0 [ 46.047625][ T412] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 46.047772][ T412] ? trace_lock_acquire+0x14c/0x1f0 [ 46.047919][ T412] ? lock_acquire+0x32/0xc0 [ 46.048066][ T412] ? blocking_notifier_call_chain+0x50/0x90 [ 46.048249][ T412] down_read+0x9f/0x340 [ 46.048374][ T412] ? blocking_notifier_call_chain+0x50/0x90 [ 46.048566][ T412] ? __pfx_down_read+0x10/0x10 [ 46.048711][ T412] ? __lock_release+0x103/0x460 [ 46.048867][ T412] ? netconsole_netdev_event+0x2c1/0x620 [ 46.049016][ T412] ? __pfx___lock_release+0x10/0x10 [ 46.049166][ T412] blocking_notifier_call_chain+0x50/0x90 [ 46.049313][ T412] __netdev_upper_dev_unlink+0xd9/0x220 [ 46.049468][ T412] ? __pfx___netdev_upper_dev_unlink+0x10/0x10 [ 46.049649][ T412] ? __mutex_unlock_slowpath+0x14a/0x3d0 [ 46.049800][ T412] ? __pfx___mutex_unlock_slowpath+0x10/0x10 [ 46.049985][ T412] ? rtnl_is_locked+0x15/0x20 [ 46.050136][ T412] netdev_upper_dev_unlink+0x71/0xa0 [ 46.050283][ T412] ? __pfx_netdev_upper_dev_unlink+0x10/0x10 [ 46.050466][ T412] ? netconsole_netdev_event+0x2c1/0x620 [ 46.050620][ T412] ? mutex_is_locked+0x1c/0x60 [ 46.050784][ T412] ? rtnl_is_locked+0x15/0x20 [ 46.050933][ T412] ? netdev_master_upper_dev_get+0x13/0x120 [ 46.051123][ T412] vrf_device_event+0x78/0xe0 [vrf] [ 46.051273][ T412] notifier_call_chain+0xcd/0x150 [ 46.051420][ T412] blocking_notifier_call_chain+0x66/0x90 [ 46.051566][ T412] unregister_netdevice_many_notify+0xa7b/0x1580 [ 46.051757][ T412] ? __lock_release+0x103/0x460 [ 46.051910][ T412] ? __pfx___lock_release+0x10/0x10 [ 46.052060][ T412] ? __pfx_unregister_netdevice_many_notify+0x10/0x10 [ 46.052241][ T412] ? hlock_class+0x4e/0x130 [ 46.052391][ T412] ? mark_held_locks+0x9e/0xe0 [ 46.052544][ T412] ? __pfx_vlan_info_rcu_free+0x10/0x10 [ 46.052696][ T412] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 46.052887][ T412] rtnl_dellink+0x348/0xa40 [ 46.053032][ T412] ? __pfx_rtnl_dellink+0x10/0x10 [ 46.053191][ T412] ? find_held_lock+0x2c/0x110 [ 46.053343][ T412] ? __lock_release+0x103/0x460 [ 46.053493][ T412] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 46.053640][ T412] ? __pfx___lock_release+0x10/0x10 [ 46.053787][ T412] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 46.053944][ T412] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 46.054091][ T412] ? __pfx_rtnl_dellink+0x10/0x10 [ 46.054236][ T412] rtnetlink_rcv_msg+0x712/0xc10 [ 46.054383][ T412] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 46.054527][ T412] ? hlock_class+0x4e/0x130 [ 46.054675][ T412] ? mark_lock+0x38/0x3e0 [ 46.054786][ T412] ? __lock_acquire+0xb9a/0x1680 [ 46.054936][ T412] netlink_rcv_skb+0x130/0x360 [ 46.055086][ T412] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 46.055231][ T412] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 46.055379][ T412] ? netlink_deliver_tap+0x13e/0x340 [ 46.055531][ T412] ? netlink_deliver_tap+0xc3/0x340 [ 46.055682][ T412] netlink_unicast+0x44b/0x710 [ 46.055830][ T412] ? __pfx_netlink_unicast+0x10/0x10 [ 46.055981][ T412] ? find_held_lock+0x2c/0x110 [ 46.056128][ T412] netlink_sendmsg+0x723/0xbe0 [ 46.056278][ T412] ? __pfx_netlink_sendmsg+0x10/0x10 [ 46.056432][ T412] ____sys_sendmsg+0x7ac/0xa10 [ 46.056582][ T412] ? __pfx_____sys_sendmsg+0x10/0x10 [ 46.056732][ T412] ? __pfx_copy_msghdr_from_user+0x10/0x10 [ 46.056920][ T412] ___sys_sendmsg+0xee/0x170 [ 46.057072][ T412] ? __pfx____sys_sendmsg+0x10/0x10 [ 46.057230][ T412] ? kasan_save_stack+0x34/0x50 [ 46.057382][ T412] ? kasan_save_stack+0x24/0x50 [ 46.057531][ T412] ? __kasan_record_aux_stack+0x8e/0xa0 [ 46.057689][ T412] ? __call_rcu_common.constprop.0+0xa1/0x4b0 [ 46.057873][ T412] ? __x64_sys_close+0x7c/0xd0 [ 46.058027][ T412] ? do_syscall_64+0xc1/0x1d0 [ 46.058173][ T412] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 46.058385][ T412] ? __lock_acquire+0xb9a/0x1680 [ 46.058544][ T412] ? find_held_lock+0x2c/0x110 [ 46.058695][ T412] ? __lock_release+0x103/0x460 [ 46.058852][ T412] ? __virt_addr_valid+0x22b/0x430 [ 46.059003][ T412] ? __pfx___lock_release+0x10/0x10 [ 46.059151][ T412] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 46.059300][ T412] __sys_sendmsg+0x109/0x1a0 [ 46.059459][ T412] ? __pfx___sys_sendmsg+0x10/0x10 [ 46.059609][ T412] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 46.059804][ T412] do_syscall_64+0xc1/0x1d0 [ 46.059951][ T412] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 46.060133][ T412] RIP: 0033:0x7fba90f979a7 [ 46.060302][ T412] Code: 0a 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b9 0f 1f 00 f3 0f 1e fa 64 8b 04 25 18 00 00 00 85 c0 75 10 b8 2e 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 51 c3 48 83 ec 28 89 54 24 1c 48 89 74 24 10 [ 46.060832][ T412] RSP: 002b:00007ffffe886f08 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 46.061057][ T412] RAX: ffffffffffffffda RBX: 00007ffffe887630 RCX: 00007fba90f979a7 [ 46.061285][ T412] RDX: 0000000000000000 RSI: 00007ffffe886f70 RDI: 0000000000000005 [ 46.061520][ T412] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078 [ 46.061751][ T412] R10: 00007fba90e55ef8 R11: 0000000000000246 R12: 0000000000000002 [ 46.061971][ T412] R13: 0000000067792f27 R14: 0000000000498600 R15: 0000000000000000 [ 46.062193][ T412]